RESTRICT A space-delimited list of portage features to restrict. Valid values are fetch, mirror, strip, test and userpriv. See man 5 ebuild for details.

man 5 ebuild, интересующая нас секция:

Code:

RESTRICT = [strip,mirror,fetch,userpriv]
This should be a space delimited list of portage features to restrict. You may use conditional syntax to vary restrictions as seen above in DEPEND.
binchecks
Disable all QA checks for binaries. This should ONLY be used in packages for which binary checks make no sense (linux-headers and kernel-sources,
for example, can safely be skipped since they have no binaries). If the binary checks need to be skipped for other reasons (such as proprietary
binaries), see the QA CONTROL VARIABLES section for more specific exemptions.
bindist
Distribution of built packages is restricted.
fetch like mirror but the files will not be fetched via SRC_URI either.
installsources
Disables installsources for specific packages. This is for packages with binaries that are not compatible with debugedit.
mirror files in SRC_URI will not be downloaded from the GENTOO_MIRRORS.
primaryuri
fetch from URIs in SRC_URI before GENTOO_MIRRORS.
strip final binaries/libraries will not be stripped of debug symbols.
test do not run src_test even if user has FEATURES=test.
userpriv
Disables userpriv for specific packages.